/*
 * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 *
 * This file is part of the lwIP TCP/IP stack.
 *
 * Author: Adam Dunkels <adam@sics.se>
 *
 */

#include "udpecho.h"

#include "lwip/opt.h"

#if LWIP_NETCONN

#include "lwip/api.h"
#include "lwip/sys.h"

/*-----------------------------------------------------------------------------------*/
static void
udpecho_thread(void* arg)
{
    struct netconn* conn;
    struct netbuf* buf;
    char buffer[4096];
    err_t err;
    LWIP_UNUSED_ARG(arg);

#if LWIP_IPV6
    conn = netconn_new(NETCONN_UDP_IPV6);
    netconn_bind(conn, IP6_ADDR_ANY, LOCAL_PORT);
#else /* LWIP_IPV6 */
    conn = netconn_new(NETCONN_UDP);
    netconn_bind(conn, IP_ADDR_ANY, LOCAL_PORT);
#endif /* LWIP_IPV6 */
    LWIP_ERROR("udpecho: invalid conn", (conn != NULL), return;);

    printf("The local port number is:%d\n\n", LOCAL_PORT);

    while (1) {
        err = netconn_recv(conn, &buf);
        if (err == ERR_OK) {
            /*  no need netconn_connect here, since the netbuf contains the address */
            if(netbuf_copy(buf, buffer, sizeof(buffer)) != buf->p->tot_len) {
                LWIP_DEBUGF(LWIP_DBG_ON, ("netbuf_copy failed\n"));
            }
            else {
                buffer[buf->p->tot_len] = '\0';
                err = netconn_send(conn, buf);
                if(err != ERR_OK) {
                    LWIP_DEBUGF(LWIP_DBG_ON, ("netconn_send failed: %d\n", (int)err));
                }
                else {
                    LWIP_DEBUGF(LWIP_DBG_ON, ("got %s\n", buffer));
                }
            }
            netbuf_delete(buf);
        }
    }
}
/*-----------------------------------------------------------------------------------*/
void
udpecho_init(void)
{
    sys_thread_new("udpecho_thread", udpecho_thread, NULL, 2048, 4);
}

#endif /* LWIP_NETCONN */
